RA/DEC (2000)
09:36:17.490 +09:18:14.69
144.072875 +9.304081
Type
AGN
Redshift
0.13
Reporting Group
GaiaAlerts
Discovering Data Source
GaiaAlerts
Discovery Date
2021-11-23 18:12:57.600
TNS AT
Y
Public
Y
Discovery Mag
16.5
Filter
G-Gaia
Reporter/s
S.T. Hodgkin, E. Breedt, A. Delgado, D.L. Harrison, M. van Leeuwen, G. Rixon, T. Wevers, A. Yoldas (IoA Cambridge), N. Ihanec, K. Kruszyńska, K.A. Rybicki, Ł. Wyrzykowski (Warsaw University Astronomical Observatory), Z. Kostrzewa-Rutkowska (Leiden Observatory), D. Eappachen (SRON/RU), G. Marton (Konkoly Observatory), on behalf of the Gaia Alerts team

Spectra

 AT_2021afkg - 2021-12-06 00:00:00 Lick-3m / KAST (UCSC)z=
Show H at z=vexp= km/s
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Show [Ca II] at z=vexp= km/s
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 Gaia_Gaia-photometric_G
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
11569 2021-12-06 00:00:00 Lick-3m / KAST M. J. Bustamante-Rosell, S. Tinyanont M. J. Bustamante-Rosell, S. Tinyanont UCSC tns_2021afkg_2021-12-06_00-00-00_Lick-3m_KAST_UCSC.flm Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
G-Gaia Gaia_Gaia-photometric 2021-10-27 06:25:55 - 2021-11-23 18:12:58 2459514.768 - 2459542.259 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
256285 2021-11-23 18:12:58 2459542.259 16.5 0.2 ABMag G-Gaia Gaia_Gaia-photometric 60 Robot
256284 2021-10-27 06:25:55 2459514.768 21.5 ABMag G-Gaia Gaia_Gaia-photometric Robot [Last non detection]
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks Bibcode Unreal Auto classification
130411 2021-11-25 08:44:40 Gaia_Bot1 S.T. Hodgkin,E. Breedt,A. Delgado et al. GaiaAlerts GaiaAlerts 09:36:17.490 +09:18:14.69 2021-11-23 18:12:57.600 16.5 G-Gaia Other Gaia21fhb GaiaAlerts 1.5 mag brightening in known Seyfert galaxy 2MASS J09361749+0918146 2021TNSTR4023....1H N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
11515 2021-12-09 05:53:12 YSE_Bot1 M. J. Bustamante-Rosell, S. Tinyanont, R. J. Foley (UCSC) UCSC AGN 0.13 1 UCSC AT2021afkg has a blue continuum and broad emission lines consistent with those of a Seyfert galaxy. The spectrum is bluer than an archival SDSS spectrum of the nucleus with consistent H-alpha FWHM of 4,700 km/s. The flux increase in recent weeks would correspond to a M ~ -22 mag object, ruling out nearly all known supernovae and tidal disruption events. AT2021afkg may represent an exceptional accretion event. ATel: 15096 2021TNSCR4124....1B
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
11569 2021-12-06 00:00:00 Lick-3m / KAST M. J. Bustamante-Rosell, S. Tinyanont M. J. Bustamante-Rosell, S. Tinyanont UCSC tns_2021afkg_2021-12-06_00-00-00_Lick-3m_KAST_UCSC.flm Object

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